The Brewers reinstated Lauer from the COVID-19 injured list ahead of his scheduled start Sunday against the Pirates.
Milwaukee optioned reliever Justin Topa to Triple-A Nashville and transferred reliever John Curtiss (elbow) from the 10-day IL to the 60-day IL to clear room for Lauer on the 26-man active roster and 40-man roster. Lauer, who was sidelined for a week and a half after testing positive for the virus, owns a 3.50 ERA and 1.24 WHIP in 69.1 innings across his 15 outings (11 starts) this season.